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java.lang.Object org.apache.lucene.search.FieldComparator<BytesRef> org.apache.lucene.search.FieldComparator.TermValComparator
public static final class FieldComparator.TermValComparator
Sorts by field's natural Term sort order. All comparisons are done using BytesRef.compareTo, which is slow for medium to large result sets but possibly very fast for very small results sets.
Nested Class Summary |
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Nested classes/interfaces inherited from class org.apache.lucene.search.FieldComparator |
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FieldComparator.ByteComparator, FieldComparator.DocComparator, FieldComparator.DoubleComparator, FieldComparator.FloatComparator, FieldComparator.IntComparator, FieldComparator.LongComparator, FieldComparator.NumericComparator<T extends Number>, FieldComparator.RelevanceComparator, FieldComparator.ShortComparator, FieldComparator.TermOrdValComparator, FieldComparator.TermValComparator |
Method Summary | |
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int |
compare(int slot1,
int slot2)
Compare hit at slot1 with hit at slot2. |
int |
compareBottom(int doc)
Compare the bottom of the queue with doc. |
int |
compareDocToValue(int doc,
BytesRef value)
Returns negative result if the doc's value is less than the provided value. |
int |
compareValues(BytesRef val1,
BytesRef val2)
Returns -1 if first is less than second. |
void |
copy(int slot,
int doc)
This method is called when a new hit is competitive. |
void |
setBottom(int bottom)
Set the bottom slot, ie the "weakest" (sorted last) entry in the queue. |
FieldComparator<BytesRef> |
setNextReader(AtomicReaderContext context)
Set a new AtomicReaderContext . |
BytesRef |
value(int slot)
Return the actual value in the slot. |
Methods inherited from class org.apache.lucene.search.FieldComparator |
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setScorer |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Method Detail |
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public int compare(int slot1, int slot2)
FieldComparator
compare
in class FieldComparator<BytesRef>
slot1
- first slot to compareslot2
- second slot to compare
public int compareBottom(int doc)
FieldComparator
FieldComparator.compare(int,int)
} as if bottom were slot1 and the new
document were slot 2.
For a search that hits many results, this method will be the hotspot (invoked by far the most frequently).
compareBottom
in class FieldComparator<BytesRef>
doc
- that was hit
public void copy(int slot, int doc)
FieldComparator
copy
in class FieldComparator<BytesRef>
slot
- which slot to copy the hit todoc
- docID relative to current readerpublic FieldComparator<BytesRef> setNextReader(AtomicReaderContext context) throws IOException
FieldComparator
AtomicReaderContext
. All subsequent docIDs are relative to
the current reader (you must add docBase if you need to
map it to a top-level docID).
setNextReader
in class FieldComparator<BytesRef>
context
- current reader context
IOException
- if there is a low-level IO errorpublic void setBottom(int bottom)
FieldComparator
FieldComparator.compareBottom(int)
is
called, you should compare against this slot. This
will always be called before FieldComparator.compareBottom(int)
.
setBottom
in class FieldComparator<BytesRef>
bottom
- the currently weakest (sorted last) slot in the queuepublic BytesRef value(int slot)
FieldComparator
value
in class FieldComparator<BytesRef>
slot
- the value
public int compareValues(BytesRef val1, BytesRef val2)
FieldComparator
compareValues
in class FieldComparator<BytesRef>
public int compareDocToValue(int doc, BytesRef value)
FieldComparator
compareDocToValue
in class FieldComparator<BytesRef>
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